401221042032121 has 16 divisors (see below), whose sum is σ = 426700661788800. Its totient is φ = 376177854786048.

The previous prime is 401221042032079. The next prime is 401221042032253. The reversal of 401221042032121 is 121230240122104.

It is a cyclic number.

It is not a de Polignac number, because 401221042032121 - 2⁷ = 401221042031993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401221042039121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88959675 + ... + 93360943.

It is an arithmetic number, because the mean of its divisors is an integer number (26668791361800).

Almost surely, 2^{401221042032121} is an apocalyptic number.

It is an amenable number.

401221042032121 is a deficient number, since it is larger than the sum of its proper divisors (25479619756679).

401221042032121 is a wasteful number, since it uses less digits than its factorization.

401221042032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450848.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 401221042032121 its reverse (121230240122104), we get a palindrome (522451282154225).

The spelling of 401221042032121 in words is "four hundred one trillion, two hundred twenty-one billion, forty-two million, thirty-two thousand, one hundred twenty-one".